Interaction of a shock wave with an array of particles and effect of particles on the shock wave weakening

Abstract

Two-phase systems that involve gas-particle or gas-droplet flows are widely used in aerospace and power engineering. The problems of weakening and suppression of detonation during saturation of a gas or liquid flow with the array of solid particles are considered. The tasks, associated with the formation of particles arrays, dust lifting behind a travelling shock wave, ignition of particles in high-speed and high-temperature gas flows are adjoined to safety of space flight. The mathematical models of shock wave interaction with the array of solid particles are discussed, and numerical methods are briefly described. The numerical simulations of interaction between sub-and supersonic flows and an array of particles being in motionless state at the initial time are performed. Calculations are carried out taking into account the influence that the particles cause on the flow of carrier gas. The results obtained show that inert particles significantly weaken the shock waves up to their suppression, which can be used to enhance the explosion safety of spacecrafts.

Evaluation of Methods for Superhard Material Processing to Ensure Wear Resistance of Finished Structures

“…This will necessitate further research using this method. 25,28 Arunkarthikeyan and Balamurugan demonstrated that freezing the material improves its hardness of the material and increases its wear resistance. Additionally, the microhardness of the WC-Co alloy also increases by approximately 5.7%.…”